And basically all synths will benefit, how much a little depending on frequency content.
A subbass sine maybe not audible.
Sample based synth with content like strings certainly audible, often one sample resampled a couple of times, not every note pitch is recorded. To resample rich frequency content so every harmonic is properly moved is hard to do.
Every pitch of a note will have less aliasing done at double samplerate, and then downsampled again.
As even one synth is audible difference, and what this does to a full mix with 5-10 synths is substantial.